summaryrefslogtreecommitdiff
path: root/source3/lib/doscalls.c
blob: 031effcf520fc44db783cb2740b388c0435b52b9 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
/* 
   Unix SMB/Netbios implementation.
   Version 1.9.
   Samba system utilities
   Copyright (C) Jeremy Allison 1992-1998
   
   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.
   
   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.
   
   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/

#include "includes.h"

/*
 * Wrappers for calls that need to translate to
 * DOS/Windows semantics. Note that the pathnames
 * in all these functions referred to as 'DOS' names
 * are actually in UNIX path format (ie. '/' instead of
 * '\' directory separators etc.), but the codepage they
 * are in is still the client codepage, hence the 'DOS'
 * name.
 */

extern int DEBUGLEVEL;

/*******************************************************************
 Unlink wrapper that calls dos_to_unix.
********************************************************************/

int dos_unlink(char *fname)
{
  return(unlink(dos_to_unix(fname,False)));
}

/*******************************************************************
 Open() wrapper that calls dos_to_unix.
********************************************************************/

int dos_open(char *fname,int flags,mode_t mode)
{
  return(sys_open(dos_to_unix(fname,False),flags,mode));
}

/*******************************************************************
 Opendir() wrapper that calls dos_to_unix.
********************************************************************/

DIR *dos_opendir(char *dname)
{
  return(opendir(dos_to_unix(dname,False)));
}

/*******************************************************************
 Readdirname() wrapper that calls unix_to_dos.
********************************************************************/

char *dos_readdirname(DIR *p)
{
  char *dname = readdirname(p);

  if (!dname)
    return(NULL);
 
  unix_to_dos(dname, True);
  return(dname);
}

/*******************************************************************
 A stat() wrapper that calls dos_to_unix.
********************************************************************/

int dos_stat(char *fname,SMB_STRUCT_STAT *sbuf)
{
  return(sys_stat(dos_to_unix(fname,False),sbuf));
}

/*******************************************************************
 An lstat() that calls dos_to_unix.
********************************************************************/

int dos_lstat(char *fname,SMB_STRUCT_STAT *sbuf)
{
  return(sys_lstat(dos_to_unix(fname,False),sbuf));
}

/*******************************************************************
 Mkdir() that calls dos_to_unix.
********************************************************************/

int dos_mkdir(char *dname,mode_t mode)
{
  return(mkdir(dos_to_unix(dname,False),mode));
}

/*******************************************************************
 Rmdir() - call dos_to_unix.
********************************************************************/

int dos_rmdir(char *dname)
{
  return(rmdir(dos_to_unix(dname,False)));
}

/*******************************************************************
 chdir() - call dos_to_unix.
********************************************************************/

int dos_chdir(char *dname)
{
  return(chdir(dos_to_unix(dname,False)));
}

/*******************************************************************
 Utime() - call dos_to_unix.
********************************************************************/

int dos_utime(char *fname,struct utimbuf *times)
{
  /* if the modtime is 0 or -1 then ignore the call and
     return success */
  if (times->modtime == (time_t)0 || times->modtime == (time_t)-1)
    return 0;
  
  /* if the access time is 0 or -1 then set it to the modtime */
  if (times->actime == (time_t)0 || times->actime == (time_t)-1)
    times->actime = times->modtime;
   
  return(utime(dos_to_unix(fname,False),times));
}

/*********************************************************
 For rename across filesystems Patch from Warren Birnbaum 
 <warrenb@hpcvscdp.cv.hp.com>
**********************************************************/

static int copy_reg(char *source, const char *dest)
{
  SMB_STRUCT_STAT source_stats;
  int ifd;
  int ofd;
  char *buf;
  int len;                      /* Number of bytes read into `buf'. */

  sys_lstat (source, &source_stats);
  if (!S_ISREG (source_stats.st_mode))
    return 1;

  if (unlink (dest) && errno != ENOENT)
    return 1;

  if((ifd = sys_open (source, O_RDONLY, 0)) < 0)
    return 1;

  if((ofd = sys_open (dest, O_WRONLY | O_CREAT | O_TRUNC, 0600)) < 0 )
  {
    close (ifd);
    return 1;
  }

  if((buf = malloc( COPYBUF_SIZE )) == NULL)
  {
    close (ifd);  
    close (ofd);  
    unlink (dest);
    return 1;
  }

  while ((len = read(ifd, buf, COPYBUF_SIZE)) > 0)
  {
    if (write_data(ofd, buf, len) < 0)
    {
      close (ifd);
      close (ofd);
      unlink (dest);
      free(buf);
      return 1;
    }
  }
  free(buf);
  if (len < 0)
  {
    close (ifd);
    close (ofd);
    unlink (dest);
    return 1;
  }

  if (close (ifd) < 0)
  {
    close (ofd);
    return 1;
  }
  if (close (ofd) < 0)
    return 1;

  /* chown turns off set[ug]id bits for non-root,
     so do the chmod last.  */

  /* Try to copy the old file's modtime and access time.  */
  {
    struct utimbuf tv;

    tv.actime = source_stats.st_atime;
    tv.modtime = source_stats.st_mtime;
    if (utime (dest, &tv))
      return 1;
  }

  /* Try to preserve ownership.  For non-root it might fail, but that's ok.
     But root probably wants to know, e.g. if NFS disallows it.  */
  if (chown (dest, source_stats.st_uid, source_stats.st_gid)
      && (errno != EPERM))
    return 1;

  if (chmod (dest, source_stats.st_mode & 07777))
    return 1;

  unlink (source);
  return 0;
}

/*******************************************************************
 Rename() - call dos_to_unix.
********************************************************************/

int dos_rename(char *from, char *to)
{
    int rcode;  
    pstring zfrom, zto;

    pstrcpy (zfrom, dos_to_unix (from, False));
    pstrcpy (zto, dos_to_unix (to, False));
    rcode = rename (zfrom, zto);

    if (errno == EXDEV) 
    {
      /* Rename across filesystems needed. */
      rcode = copy_reg (zfrom, zto);        
    }
    return rcode;
}

/*******************************************************************
 Chmod - call dos_to_unix.
********************************************************************/

int dos_chmod(char *fname,mode_t mode)
{
  return(chmod(dos_to_unix(fname,False),mode));
}

/*******************************************************************
 Getwd - takes a UNIX directory name and returns the name
 in dos format.
********************************************************************/

char *dos_getwd(char *unix_path)
{
	char *wd;
	wd = sys_getwd(unix_path);
	if (wd)
		unix_to_dos(wd, True);
	return wd;
}

/*******************************************************************
 Check if a DOS file exists.
********************************************************************/

BOOL dos_file_exist(char *fname,SMB_STRUCT_STAT *sbuf)
{
  return file_exist(dos_to_unix(fname, False), sbuf);
}

/*******************************************************************
 Check if a DOS directory exists.
********************************************************************/

BOOL dos_directory_exist(char *dname,SMB_STRUCT_STAT *st)
{
  return directory_exist(dos_to_unix(dname, False), st);
}

/*******************************************************************
 Return the modtime of a DOS pathname.
********************************************************************/

time_t dos_file_modtime(char *fname)
{
  return file_modtime(dos_to_unix(fname, False));
}

/*******************************************************************
 Return the file size of a DOS pathname.
********************************************************************/

SMB_OFF_T dos_file_size(char *file_name)
{
  return file_size(dos_to_unix(file_name, False));
}

/*******************************************************************
 A wrapper for dos_chdir().
********************************************************************/

int dos_ChDir(char *path)
{
  int res;
  static pstring LastDir="";

  if (strcsequal(path,"."))
    return(0);

  if (*path == '/' && strcsequal(LastDir,path))
    return(0);

  DEBUG(3,("dos_ChDir to %s\n",path));

  res = dos_chdir(path);
  if (!res)
    pstrcpy(LastDir,path);
  return(res);
}

/* number of list structures for a caching GetWd function. */
#define MAX_GETWDCACHE (50)

struct
{
  SMB_DEV_T dev; /* These *must* be compatible with the types returned in a stat() call. */
  SMB_INO_T inode; /* These *must* be compatible with the types returned in a stat() call. */
  char *dos_path; /* The pathname in DOS format. */
  BOOL valid;
} ino_list[MAX_GETWDCACHE];

BOOL use_getwd_cache=True;

/****************************************************************************
 Prompte a ptr (to make it recently used)
****************************************************************************/

static void array_promote(char *array,int elsize,int element)
{
  char *p;
  if (element == 0)
    return;

  p = (char *)malloc(elsize);

  if (!p)
    {
      DEBUG(5,("Ahh! Can't malloc\n"));
      return;
    }
  memcpy(p,array + element * elsize, elsize);
  memmove(array + elsize,array,elsize*element);
  memcpy(array,p,elsize);
  free(p);
}

/*******************************************************************
 Return the absolute current directory path - given a UNIX pathname.
 Note that this path is returned in DOS format, not UNIX
 format.
********************************************************************/

char *dos_GetWd(char *path)
{
  pstring s;
  static BOOL getwd_cache_init = False;
  SMB_STRUCT_STAT st, st2;
  int i;

  *s = 0;

  if (!use_getwd_cache)
    return(dos_getwd(path));

  /* init the cache */
  if (!getwd_cache_init)
  {
    getwd_cache_init = True;
    for (i=0;i<MAX_GETWDCACHE;i++)
    {
      string_init(&ino_list[i].dos_path,"");
      ino_list[i].valid = False;
    }
  }

  /*  Get the inode of the current directory, if this doesn't work we're
      in trouble :-) */

  if (sys_stat(".",&st) == -1)
  {
    DEBUG(0,("Very strange, couldn't stat \".\"\n"));
    return(dos_getwd(path));
  }


  for (i=0; i<MAX_GETWDCACHE; i++)
    if (ino_list[i].valid)
    {

      /*  If we have found an entry with a matching inode and dev number
          then find the inode number for the directory in the cached string.
          If this agrees with that returned by the stat for the current
          directory then all is o.k. (but make sure it is a directory all
          the same...) */

      if (st.st_ino == ino_list[i].inode &&
          st.st_dev == ino_list[i].dev)
      {
        if (dos_stat(ino_list[i].dos_path,&st2) == 0)
        {
          if (st.st_ino == st2.st_ino &&
              st.st_dev == st2.st_dev &&
              (st2.st_mode & S_IFMT) == S_IFDIR)
          {
            pstrcpy (path, ino_list[i].dos_path);

            /* promote it for future use */
            array_promote((char *)&ino_list[0],sizeof(ino_list[0]),i);
            return (path);
          }
          else
          {
            /*  If the inode is different then something's changed,
                scrub the entry and start from scratch. */
            ino_list[i].valid = False;
          }
        }
      }
    }


  /*  We don't have the information to hand so rely on traditional methods.
      The very slow getcwd, which spawns a process on some systems, or the
      not quite so bad getwd. */

  if (!dos_getwd(s))
  {
    DEBUG(0,("dos_GetWd: dos_getwd call failed, errno %s\n",strerror(errno)));
    return (NULL);
  }

  pstrcpy(path,s);

  DEBUG(5,("dos_GetWd %s, inode %.0f, dev %.0f\n",s,(double)st.st_ino,(double)st.st_dev));

  /* add it to the cache */
  i = MAX_GETWDCACHE - 1;
  string_set(&ino_list[i].dos_path,s);
  ino_list[i].dev = st.st_dev;
  ino_list[i].inode = st.st_ino;
  ino_list[i].valid = True;

  /* put it at the top of the list */
  array_promote((char *)&ino_list[0],sizeof(ino_list[0]),i);

  return (path);
}